... yield in % v + VI bp in "C p in mm Hg 60 60 72 70 50 77 85 82 Vb VI VIC VIC VIC VIC V VI V VId V VI ... and F. Sondheimer, J. Chem. SOC., 1947, 1583. Hexp. - - 9.6 10.2 10.8 11.0 11.3 9.7 11.0 - - 8.3 9.7 Page 5. Chemistry of acetylenic ethers. Part 88 86 (1967) RECUEIL 397 ...